So if we don't attempt to change now, then when? How long do we continue to let perfect be the enemy of good?

When the opposition is not an actual lunatic. There has not been a more damaging president in any way, we can't even know the death count of the gutting of research and USAID, and those impacts will be felt for decades. He showed Iran that they have control over most of the world's economy, and now we're strengthening one of our biggest adversaries in Russia. We've ruined relations with EVERY country. Not to say anyone would have predicted it would be THIS bad, but the warning signs were there in what he was promising to do. Protest vote Romney vs Obama, that would suck but at least not destroy the entire world like Trump.